DLP key, you are right - this is easily breakable, but this is oirrelebvant becuase such small sized PK keys have never been used (even not by SESAME). If you are talking about symmetric encryption: you can't break a modern 128 bit symmetric algorithm (e.g. IDEA, CAST5, AES) by brute force and all these algorithms have undergone a very deep analysis. We have a lot of knowledge about symmetric ciphers and everyone is sure that tehre is no way to break hem.
NSA folks will tell you, that they are cheating to decrypt messages; this might include a lot of different techniques (e.g van Eck radiation); but one thing is for sure: An interceptor who just gets his hands on an encrypted message is not able to break it if the encryption has been done properly.
Beware of snake oil,
Werner
p.s. This is not the appropriate forum to discuss this; feel free to take this to gnupg-users@gnupg.org or any other crypto related ML.